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| A New Estimation Method of Instantaneous Frequency Rate for Multicomponent Polynomial Phase Signal |
| Zhang Wen-wen Si Xi-cai |
| College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China |
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Abstract This paper discusses some redundancy steps of FRFT in signal detection based on the decomposition of FRFT, and puts forward a Reduced FRFT (RFRFT) algorithm. Then it discusses several important characters of RFRFT in detail. Combined with the phase difference method, it proposes the product RFRFT arithmetic to realize the Instantaneous Frequency Rate (IFR) estimation of mc-PPS. And it enhances the parameter resolution rate of RFRFT by angle transform. This method is easy to calculate and implement. Simulation results validate the method is able to suppress the noise and cross-terms, and can apply to low SNR environment.
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Received: 03 December 2007
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Corresponding Authors:
Zhang Wen-wen
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2008, Vol. 30 
